The 82C50A Asynchronous Communication Element (ACE) is a high performance programmable Universal Asynchronous Receiver/Transmitter (UART) and Baud Rate Generator (BRG) on a single chip. Using Intersil's advanced Scaled SAJI IV CMOS Process, the ACE will support data rates from DC to 625K baud (0-10MHz clock). The ACE's receiver circuitry converts start, data, stop, and parity bits into a parallel data word. The transmitter circuitry converts a parallel data word into serial form and appends the start, parity, and stop bits. The word length is programmable to 5, 6, 7, or 8 data bits. Stop bit selection provides a choice of 1, 1. 5, or 2 stop bits. The Baud Rate Generator divides the clock by a divisor programmable from 1 to 216-1 to provide standard RS- 232C baud rates when using any one of three industry standard baud rate crystals (1. 8432MHz, 2. 4576MHz, or 3. 072MHz). A programmable buffered clock output (BAUDOUT) provides either a buffered oscillator or 16X (16 times the data rate) baud rate clock for general purpose system use. To meet the system requirements of a CPU interfacing to an asynchronous channel, the modem control signals RTS, CTS, DSR, DTR, RI, DCD are provided. Inputs and outputs have been designed with full TTL/CMOS compatibility in order to facilitate mixed TTL/NMOS/CMOS system design.


  • Single Chip UART/BRG
  • DC to 625K Baud (DC to 10MHz Clock)
  • Crystal or External Clock Input
  • On Chip Baud Rate Generator 1 to 65535 Divisor Generates 16X Clock
  • Prioritized Interrupt Mode
  • Fully TTL/CMOS Compatible
  • Microprocessor Bus Oriented Interface
  • 80C86/80C88 Compatible
  • Scaled SAJI IV CMOS Process
  • Low Power - 1mA/MHz Typical
  • Modem Interface
  • Line Break Generation and Detection
  • Loopback and Echo Modes
  • Doubled Buffered Transmitter and Receiver
  • Single 5V Supply
  • Pb-Free Plus Anneal Available (RoHS Compliant)

Product Options

Part Number Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active PLCC Tube 26
Active PLCC Reel 500
Active PLCC Tube 26

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
82C50A Datasheet Datasheet PDF 1.10 MB
PCN12087 - PLCC w/ Gold Bond Wire from ANST to ATP as Alternate Assembly Site Product Change Notice PDF 86 KB
PIN19008 - Q1 2019 Price Increase Notice Price Increase Notice PDF 200 KB
Semiconductor Package Mount Manual 日本語, 简体中文 Other PDF 10.28 MB
PIN17006 - Q1 2017 Price Increase Price Increase Notice PDF 227 KB
Semiconductor Reliability Handbook 日本語 Other PDF 14.70 MB
QFN Mounting Manual 日本語, 简体中文 Other PDF 3.19 MB